huán fēng ㄏㄨㄢˊ ㄈㄥ 环封（环封） 壅土于周围。《管子·轻重丁》：“ 江 淮 之间，有一茅而三脊，母至其本，名之曰菁茅。请使天子之吏，环封而守之。”
环封式麻醉 circular anesthesia ; anesthesia circuit
环封闸门 ring seal gate
阀座环、密封圈 seat ring ; sealing ring ; seupon ring
环氧灌封料 PGL ; Epoxy sealing material
水封环 [机] Water seal cage ; water seal ring ; water sealing ring ; lantern ring
环氧尸密封 epoxy potting ; epoxy encapsulation ; epoxy sealing
泵体密封环 casing ring ; casing seel ring
环氧封闭漆 Epoxy sealer
浮动环密封 [机] floating ring seal ; float-ring seal
实践证明它优于常规水泥体系，可提高固井质量和水泥环封隔有效期。
Through practice, the results show that its property surpass regular cement system, and can improve cementing quality and the period of validity of cement sheath plugging.
介绍迷宫环封密装置在吸口侧无封水的大功率泥浆泵上的应用，以及迷宫环的设置与安装。
The paper introduces the application and installation of labyrinth sealing device in high - power mud pump without being sealed at suction mouth side.
径向引线固定电感器，在铁氧体磁芯上单层或多层绕线，环氧树造脂包封，包装形式可以编带也可袋装。
Radial lead coil, single or multi-layer winding on ferrite core, coating by epoxy resin. Products can be taped or packed in viny bangs.
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